CN107288873B - Hydraulic power unit and its pump - Google Patents
Hydraulic power unit and its pump Download PDFInfo
- Publication number
- CN107288873B CN107288873B CN201710758312.2A CN201710758312A CN107288873B CN 107288873 B CN107288873 B CN 107288873B CN 201710758312 A CN201710758312 A CN 201710758312A CN 107288873 B CN107288873 B CN 107288873B
- Authority
- CN
- China
- Prior art keywords
- rotor
- plugging block
- oil guide
- guide channel
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/356—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C2/3566—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along more than one line or surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
Abstract
The present invention relates to a kind of hydraulic power unit and its pumps, pump includes the pump housing with cylindrical hole inner cavity, rotor is provided in the pump housing, the inlet opening and fluid hole separated by partition is provided on the pump housing, one end of partition and rotor outer periphery face sliding pushing tow cooperation, the major diameter direction both ends of rotor are provided with the Oil Guide channel of connection rotor circumferential direction two sides, also along major diameter direction, guiding movement is equipped with plugging block in rotor, plugging block has in its shift motion gets out of the way the first position in Oil Guide channel and moves and block the second position in Oil Guide channel outwardly under the action of the centrifugal force, the spring for applying active force to plugging block and plugging block being forced to be in first position is provided on rotor, the outside end of plugging block is provided with plugging block end tooth, it is provided on the respective side conduit wall in Oil Guide channel and inserting is closed for the plugging block end tooth with the second position to form fan Palace sealing structure rotor end tooth.The pump of starting load can be reduced the present invention provides one kind and using the hydraulic power unit of the pump.
Description
Technical field
The present invention relates to a kind of hydraulic power unit and its pumps.
Background technique
Currently, hydraulic power unit is relatively conventional in production, life, hydraulic power unit includes motor and by motor
The pump of drive, existing pump " pump " as disclosed in Chinese patent CN101749228A, which includes pedestal, and pump is provided on pedestal
Body, the pump housing have cylindrical hole inner cavity, and the rotor that pivot center extends along the longitudinal direction is provided in cylindrical hole inner cavity, and rotor is cut
There are two point of contacts for face and cylindrical hole inner cavity.The periphery of the pump housing is provided with hole, and guiding movement is equipped with baffle at hole, and baffle is by the hole
It is divided into inlet and liquid outlet, rotor is cylinder, one end of partition and rotor outer periphery face sliding pushing tow cooperation.
In use, rotor clockwise rotates, the cavity of rotor two sides communicates with inlet and liquid outlet respectively, wherein with into
The wall that liquid mouth communicates is low pressure chamber, and the cavity communicated with liquid outlet is high pressure chest, and partition cooperates with rotor sliding pushing tow always
Guarantee that low pressure chamber and high pressure chest are obstructed, during rotation, hydraulic oil is inhaled into low pressure chamber through oil inlet to rotor, with rotor
Rotation is squeezed and is discharged through oil outlet, realizes pump oil.Existing this pump has problems in that: rotor is driven by a motor and turns
It is dynamic, for corresponding motor, the larger not only power consumption of starting load but also also larger to the loss of motor, and in the prior art, motor
Also hydraulic oil is filled with when starting in low pressure chamber, to complete to do work to hydraulic oil could complete the starting of motor, this is increased by
The starting load of motor, lowest power when not only resulting in choice of electrical machine increased, and also will affect the normal energy consumption of motor.
Summary of the invention
The purpose of the present invention is to provide the pumps that one kind can reduce starting load；The object of the invention is also to provide one
Kind uses the hydraulic power unit of the pump.
In order to solve the above technical problems, hydraulic power unit technical solution is as follows in the present invention:
Hydraulic power unit, including motor and the pump being driven by motor, pump includes the pump housing with cylindrical hole inner cavity, the pump housing
In be provided with pivot center at the moment rear direction extend, cross section be elliptoid rotor, the cross section of rotor and cylindricality internal control
Tool is provided with the inlet opening and fluid hole separated by partition there are two point of contact on the pump housing, one end and rotor outer periphery face of partition are sliding
Dynamic pushing tow cooperation, the major diameter direction both ends of rotor are provided with the Oil Guide channel of connection rotor circumferential direction two sides, also along major diameter in rotor
Direction guiding movement is equipped with plugging block, plugging block have in its shift motion the first position for getting out of the way the Oil Guide channel and
It moves and blocks the second position in the Oil Guide channel outwardly under the action of the centrifugal force, be provided on rotor to the plugging block and applied
The spring for adding active force and plugging block being forced to be in first position, the outside end of plugging block are provided with plugging block end tooth, Oil Guide
It is provided on the respective side conduit wall in channel and inserting is closed to form labyrinth seal knot for the plugging block end tooth with the second position
Structure rotor end tooth.
Shown spring is the pressure spring being set on the outside of plugging block.
The technical solution pumped in the present invention are as follows:
Pump, including the pump housing with cylindrical hole inner cavity, is provided with that pivot center extends along the longitudinal direction, transversal in the pump housing
Face is elliptoid rotor, the cross section of rotor and cylindricality internal control tool there are two point of contact, is provided on the pump housing and to be separated by partition
Inlet opening and fluid hole, one end of partition and rotor outer periphery face sliding pushing tow cooperation, the major diameter direction both ends of rotor are provided with connection
The Oil Guide channel of logical rotor circumferential direction two sides, also along major diameter direction, guiding movement is equipped with plugging block in rotor, and plugging block is in its shifting
There is the first position for getting out of the way the Oil Guide channel in dynamic stroke and move outwardly under the action of the centrifugal force and block the Oil Guide
The second position in channel is provided with the bullet for applying active force to the plugging block and plugging block being forced to be in first position on rotor
Spring, the outside end of plugging block are provided with plugging block end tooth, are provided on the respective side conduit wall in Oil Guide channel for second
The plugging block end tooth of position closes to form labyrinth seal structure rotor end tooth inserting.
The spring is the pressure spring being set on the outside of plugging block.
The invention has the benefit that, when rotor does not rotate, being acted on by spring in the present invention, plugging block is in first
Position, the circumferential two sides of Oil Guide channel connection rotor, when rotor ground zero, since revolving speed is also relatively slow, centrifugal force is not enough to
Overcome the active force of spring, therefore Oil Guide channel is still connected, the oil pressure of rotor circumferential direction two sides is consistent, therefore the starting of rotor
Load is smaller, and when the speed of rotor reaches certain value, the centrifugal force of plugging block overcomes the active force of spring, and plugging block is moved outwardly
It moves to the second position, Oil Guide channel is blocked, to realize normal fuel feeding, plugging block end tooth and rotor end tooth after inserting to forming
Labyrinth seal structure, with this come when guaranteeing that plugging block is in the second position, Oil Guide channel is by good sealing.
Detailed description of the invention
Fig. 1 is status diagram when pumping inactive in hydraulic power unit embodiment of the present invention；
Fig. 2 is the status diagram in hydraulic power unit embodiment of the present invention after pump startup；
Fig. 3 is the top view of rotor in Fig. 1；
Fig. 4 is enlarged drawing at A in Fig. 2；
Fig. 5 is the cooperation schematic diagram of brake device for electrical machinery and motor shaft in hydraulic power unit embodiment of the present invention；
Fig. 6 is the cooperation schematic diagram of motor shaft and bearing block in hydraulic power unit embodiment of the present invention；
Fig. 7 is the structural schematic diagram that spanner is adjusted in hydraulic power unit embodiment of the present invention；
Fig. 8 is the side view of Fig. 7；
Fig. 9 is the cooperation schematic diagram of electric machine casing and the pump housing in hydraulic power unit embodiment of the present invention.
Specific embodiment
The implementation of hydraulic power unit is for example shown in Fig. 1 ~ 9 in the present invention: including motor 37 and pump 36, pump 36 includes having
The pump housing 2 of cylindrical hole inner cavity, it is elliptoid rotor that pivot center extends along the longitudinal direction, cross section is provided in the pump housing 2
5, the cross section of rotor 5 and bore tool are provided with hole on the pump housing there are two point of contact, at hole guiding movement be equipped with one end with
Rotor outer periphery face sliding pushing tow cooperation for hole to be separated into the partition 9 of inlet 8, liquid outlet 1, cylindrical hole inner cavity also by every
Plate 9 is separated into the high pressure chest 3 with the low pressure chamber 11 of 8 connection of inlet and with 1 connection of liquid outlet, and the major diameter direction both ends of rotor are set
It is equipped with the Oil Guide channel 7 of connection rotor circumferential direction two sides, the longitudinal section in Oil Guide channel 7 is arc-shaped structure, the circle of arc-shaped structure
The heart is between the Oil Guide channel of two sides, and every side Oil Guide channel has multiple, and each Oil Guide channel of each side is along rotor axial interval cloth
It sets, the compartment 71 between each Oil Guide channel of every side can play the role of supporting clapboard 9 to avoid partition board stagnant
Into Oil Guide channel.The both ends of rotor are additionally provided with the pilot hole that guide direction extends along the major diameter direction of rotor, and two are led
Xiang Kongzhong is individually directed movement and is equipped with plugging block 4, and each plugging block 4 is corresponding with corresponding Oil Guide channel 7 respectively, Oil Guide
Channel is the linear type channel perpendicular with plugging block moving direction, and plugging block has in its shift motion gets out of the way corresponding Oil Guide
The first position in channel 7 and the second position for moving and blocking corresponding Oil Guide channel 7 outwardly under the action of the centrifugal force, on rotor 5
It is provided with corresponding with each plugging block for forcing plugging block to be in first position to corresponding plugging block application active force
Spring, spring is the pressure spring 6 being set on the outside of plugging block in the present embodiment, and the outside end of plugging block is provided with plugging block end tooth
72, the rotor end tooth 73 for being adapted to interfix with plugging block end tooth, plugging block end tooth 72 and rotor end tooth 73 are provided on rotor
Labyrinth seal structure is formed after interfix, each monodentate in plugging block end tooth, rotor end tooth is v-shaped structure, labyrinth seal knot
Structure is a kind of common seal form, bent after having hydraulic oil to enter in the gap between plugging block end tooth and rotor end tooth
The other side that the path of folding will prevent hydraulic oil from flowing to plugging block, can guarantee in rotor During regular rotation, Oil Guide in this way
The excellent sealing in channel, while the both ends support to plugging block 4 is also formed, guarantee the anti-pressure ability of plugging block 4, guarantees plugging block
The service life to work under high oil pressure.It when motor is inactive, is acted on by pressure spring 6, each plugging block is in and gets out of the way corresponding Oil Guide
The first position in channel is as shown in Figure 1, motor is in incipient start-up course, and rotor speed is smaller, the centrifugal force of plugging block
It is not enough to overcome the active force of pressure spring, therefore Oil Guide channel is always to be connected, the pressure of rotor circumferential direction two sides is identical, rotor fortune
The dynamic resistance being subject to is just smaller, and low-load starting may be implemented, and low-power machine can realize the load starting of rotor, turn
After rotor speed reaches certain speed, such as after motor speed reaches 1000r/min, the centrifugal force of rotor overcomes the bullet of pressure spring
Power, plugging block are displaced outwardly Oil Guide passage plugging, pump and normal fuel injection can be achieved.In actual use, it can be wanted according to using
It asks, selects suitable spring or adjust the preload amount of spring normal fuel injection may be implemented to adjust motor in what revolving speed.
Motor includes the electric machine casing 12 connecting with the pump housing, arranges before and after electric machine casing 12, the pump housing 2, sets in electric machine casing
It is equipped with the motor shaft 18 that pivot center extends along the longitudinal direction, dynamic sealing mechanism 30 is provided between motor shaft 18 and the pump housing 2, electricity
The front side of dynamic sealing mechanism 30 is provided with drain nut 32 on arbor 18, is evenly distributed on the outer edge of drain nut 32
There are multiple notches 33.Annular groove 34 corresponding with drain nut 32 is provided on electric machine casing, annular groove 34 is in dynamic
The front side of sealing mechanism, the bottom of annular groove 34 are provided with drainage hole 35, and the upper end of electric machine casing is provided with air inlet 31, into
Stomata 31 is in the front side of dynamic sealing mechanism 30, and breather cheek valve is provided at air inlet 31, and gas can enter through the external world, but
It is that internal liquid cannot be discharged through breather cheek valve.The liquid sucting port 10 with high pressure chest connection, liquid sucting port are provided on the pump housing
Liquid non-return valve is provided at 10, liquid can enter the pump housing through liquid sucting port, but cannot be discharged through liquid sucting port, liquid sucting port 10
It is connect with drainage hole 35 by hose.In normal use, dynamic sealing mechanism may fail power assembly, at this time the liquid in pump
Pressure oil can be through flow direction motor between dynamic sealing mechanism and motor shaft, after hydraulic oil flows on drain nut 32,32 quilt of hydraulic oil
Get rid of into annular groove 34, and annular groove 34 then through drainage hole 35, liquid sucting port 10 and pump low pressure chamber be connected, leakage it is hydraulic
Oil can be drawn into low pressure chamber again, participate in the pump oil of next stage.
Motor further includes the brake device for electrical machinery for braking to motor shaft, and brake device for electrical machinery includes multiple along week
To spaced apart brake units 13, each brake units 13 include can be along the brake shoes of motor shaft radial floating by spring
16, brake units further include the fixation steel disc 14 being oppositely arranged with brake shoes, and system is provided between brake shoes 16 and electric machine casing
It moves spring 15, electromagnetic coil is provided in brake shoes 16, electromagnetic coil is electrically connected with the supply lines of motor.Figure middle term 17 indicates bullet
Spring guide cylinder, in motor normal power supply, electromagnetic coil, which is powered, generates magnetic force and attracting with fixed steel disc 14, overcomes braking with this
Acting force of the spring, brake shoes are not contacted with motor shaft, when motor power-off, by the effect of tripping spring, each brake shoes with electricity
Arbor contacts and realizes friction catch.Entire brake units are arranged on fixed electric machine casing, rather than are arranged in electricity
On arbor, when motor shaft normal rotation, does not need to expend more loads, facilitates energy conservation, while becoming to solenoid yet
It must be more easier, whole device is easy to accomplish, and is not easy to break down.
General bearing block is provided in the end of electric machine casing, general bearing block is adapted to the electricity of plurality of specifications size
Arbor, basic structure are as follows: bearing block includes frame-shaped body 21, and the clamping list of a pair of opposing is provided on frame-shaped body
Member, two clamping units are referred to as clamping unit 20 and lower clamping unit 19, and each clamping unit includes and frame shape sheet
The screw rod 23 that body is threadedly coupled, the screw flight of upper and lower clamping unit is oppositely oriented and is coaxially set, and the inner end of screw rod is set
It is equipped with grip block 24, screw rod can be rotated relative to grip block, gripped between two grip blocks for matching with motor shaft 18
The bearing 25 of conjunction.The upper end of the screw rod of upper clamping unit is provided with the upper vertical bar jack 22 axially vertical with screw rod, lower bearing list
The lower end of the screw rod of member is provided with the lower vertical bar jack 50 axially vertical with screw rod, and upper and lower vertical bar jack respectively constitutes two spiral shells
The torque input structure of bar.Bearing block further includes the adjustment spanner for adjusting distance between the grip block of upper and lower clamping unit,
Adjust spanner as seen in figs. 5-6 comprising cross bar 27 and two can be along the vertical bar 26 of 27 extending direction guiding movement of cross bar, vertical bars
26 are slidably matched by the T shape end 28 of its end and the guiding of T-slot 29 on cross bar 27, in use, two vertical bars 26 of adjustment
Position, two vertical bars are respectively inserted in the correspondence vertical bar jack of upper and lower clamping unit, then move cross bar around the axis of screw rod
Line rotation, cross bar drive two vertical bars to swing, to drive each screw rod to rotate, to realize the grip block of upper and lower clamping unit
Relative movement adjustment is moved away from adjustment, and to match the bearing of different-diameter, which is had the beneficial effect that, two spiral shells
The rotational angle of bar is consistent, therefore the moving distance of the grip block of upper and lower clamping unit is consistent, this is ensured that
No matter how general bearing block adjusts, and can guarantee that the center of bearing is constant, prevents motor axis deviation and causes bearing
Abrasion is very fast.In other embodiments of the invention, adjustment spanner can also not as bearing block technical solution a part, than
Such as say in addition adjustment spanner can be sold separately；Torque input structure on screw rod is also possible to flat head structure, at this time can be
Driving groove with the cooperation of flat head structure rotation stop is set on vertical bar.
The implementation of pump is for example shown in Fig. 1 ~ 9: the specific structure of pump and above-mentioned each hydraulic power unit are as described in the examples
Pump identical, this will not be detailed here.
Claims (4)
1. hydraulic power unit, including motor and the pump being driven by motor, pump includes the pump housing with cylindrical hole inner cavity, in the pump housing
Being provided with pivot center extends along the longitudinal direction, cross section is elliptoid rotor, the cross section and cylindrical hole inner cavity of rotor
Tool is provided with the inlet opening and fluid hole separated by partition there are two point of contact on the pump housing, one end and rotor outer periphery face of partition are sliding
Dynamic pushing tow cooperation, it is characterised in that: the major diameter direction both ends of rotor are provided with the Oil Guide channel of connection rotor circumferential direction two sides, rotor
Inside also along major diameter direction, guiding movement is equipped with plugging block, and plugging block has in its shift motion gets out of the way the Oil Guide channel
First position and the second position for moving and blocking the Oil Guide channel outwardly under the action of the centrifugal force are provided with to institute on rotor
The spring that plugging block applies active force and plugging block is forced to be in first position is stated, the outside end of plugging block is provided with plugging block
End tooth is provided on the respective side conduit wall in Oil Guide channel and is closed to inserting for the plugging block end tooth with the second position to form fan
Palace sealing structure rotor end tooth.
2. hydraulic power unit according to claim 1, it is characterised in that: the spring is to be set on the outside of plugging block
Pressure spring.
3. pump, including the pump housing with cylindrical hole inner cavity, is provided with pivot center extends along the longitudinal direction, cross section in the pump housing
For elliptoid rotor, the cross section of rotor and cylindrical hole inner cavity tool are provided on the pump housing and to be separated by partition there are two point of contact
Inlet opening and fluid hole, one end of partition and rotor outer periphery face sliding pushing tow cooperation, it is characterised in that: the major diameter direction two of rotor
End is provided with the Oil Guide channels of connection rotor circumferential direction two sides, and also along major diameter direction, guiding movement is equipped with plugging block in rotor, envelope
Sprue has the first position for getting out of the way the Oil Guide channel in its shift motion and moves and seal outwardly under the action of the centrifugal force
The second position in the Oil Guide channel is blocked up, is provided on rotor to the plugging block and is applied active force and plugging block is forced to be in the
The spring of one position, the outside end of plugging block are provided with plugging block end tooth, are provided on the respective side conduit wall in Oil Guide channel
Inserting is closed to form labyrinth seal structure rotor end tooth for the plugging block end tooth with the second position.
4. pump according to claim 3, it is characterised in that: the spring is the pressure spring being set on the outside of plugging block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758312.2A CN107288873B (en) | 2017-08-29 | 2017-08-29 | Hydraulic power unit and its pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758312.2A CN107288873B (en) | 2017-08-29 | 2017-08-29 | Hydraulic power unit and its pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107288873A CN107288873A (en) | 2017-10-24 |
| CN107288873B true CN107288873B (en) | 2019-01-08 |
Family
ID=60107132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710758312.2A Expired - Fee Related CN107288873B (en) | 2017-08-29 | 2017-08-29 | Hydraulic power unit and its pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107288873B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749228A (en) * | 2008-12-15 | 2010-06-23 | 陈双利 | Pump |
| CN103016337A (en) * | 2011-09-28 | 2013-04-03 | 秦永 | Pump |
| WO2013162427A1 (en) * | 2012-04-26 | 2013-10-31 | Закрытое Акционерное Общество "Новомет-Пермь" (Зао "Новомет-Пермь") | Multi-stage vane pump |
| CN105626515A (en) * | 2016-03-03 | 2016-06-01 | 凤杰图 | Pump |
-
2017
- 2017-08-29 CN CN201710758312.2A patent/CN107288873B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749228A (en) * | 2008-12-15 | 2010-06-23 | 陈双利 | Pump |
| CN103016337A (en) * | 2011-09-28 | 2013-04-03 | 秦永 | Pump |
| WO2013162427A1 (en) * | 2012-04-26 | 2013-10-31 | Закрытое Акционерное Общество "Новомет-Пермь" (Зао "Новомет-Пермь") | Multi-stage vane pump |
| CN105626515A (en) * | 2016-03-03 | 2016-06-01 | 凤杰图 | Pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107288873A (en) | 2017-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Zhuo Inventor before: Ma Laixun |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 Termination date: 20190829 |